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    • 7. 发明公开
    • OPTICAL RECEIVER DEVICE
    • 光接收器
    • EP2697920A1
    • 2014-02-19
    • EP12748251.1
    • 2012-04-16
    • Consorzio Nazionale Interuniversitario per le Telecomunicazioni (CNIT)
    • POTI', LucaSECONDINI, Marco
    • H04B10/158H04J14/02
    • H04B10/677H04J14/02H04L27/223
    • A wavelength division multiplexing optical receiver circuit (40) com¬ prising a means for receiving a PSK-type optical signal (Γ), in partic¬ ular a DQPSK optical receiver device, a wavelength demultiplexing means (53) for demultiplexing the optical signal, configured to provide a plurality of optical signals (7',7",7"',7""), each optical signal hav¬ ing a specific wavelength, an optical signal conversion means (35,36) for converting each optical signals (7',7",7"',7"") into respective elec¬ tric outlet signals (8',8",8"',8""), a control and decoding means for the electric outlet signals (8',8",8"',8""), wherein a delay means and an optical hybrid coupler (54"), in particular a 90° optical hybrid coupler, are provided upstream of the demultiplexing means (53), for carry¬ ing out a combination of signals (5',5") before the wavelength demul¬ tiplexing step. The feature of the device is that the wavelength de¬ multiplexing means (53) for demultiplexing the optical signal compris¬ es an array of waveguide bows (53'), each of them having a different length with respect to the others and having a common origin. The in¬ vention provides a receiver with a number of components lower than the prior art DQPSK receivers, which allows more widely using the PSK techniques, in particular the DQPSK technique, even if a large number of channels is received, which case can be dealt with only by a pro¬ hibitively complex construction.